lxslot

	LXSLOT(slot.i2.r)

	This routine sets the pseudo crate slot number of the graphics
	controller which future calls to the LX routines will write to.
	The default at program initialization is the LX window.

	slot		graphics window
			(GXPA_1 -> GxPx1 window,
			 GXPA_2 -> GxPx2 window)